diff --git a/Puffer_Speicher/form.json b/Puffer_Speicher/form.json
index 1c2643a..e43498d 100644
--- a/Puffer_Speicher/form.json
+++ b/Puffer_Speicher/form.json
@@ -55,10 +55,10 @@
             "name": "StageSelect",
             "caption": "Stufen",
             "options": [
-                { "caption": "1-stufig", "value": 1 },
-                { "caption": "2-stufig", "value": 2 },
-                { "caption": "3-stufig", "value": 3 },
-                { "caption": "4-stufig", "value": 4 }
+                { "caption": "1-stufig", "value": "1" },
+                { "caption": "2-stufig", "value": "2" },
+                { "caption": "3-stufig", "value": "3" },
+                { "caption": "4-stufig", "value": "4" }
             ]
             },
             {